Question

Describe any four properties of metals and non metal both​

Answer 1

The Physical properties of Metals and Non-metals are :

1. Physical state :

• Most of the metals are solid at room temperature. Mercury is the only metal known to occur in liquid state at room temperature. No Metal exists in gasesos state.
• Non-are generally solid or gaseous.

2. Malleability and Brittleness :

• The property which allows the metal to be drawn into thin sheets or foils is called Malleability.
• The property due to which Non metals break up into pieces on hammering is called Brittleness. Non metals are generally brittle.

3. Ductily :

• The property which allows metal to be drawn into thin wires is called Ductily.
• Non-metals are not ductile.

4. Lustre :

• Most of the metals are lustrous, that they have a shiny surface. This property is called metallic lustre.
• Non-metals do not have shiny appearance like metals. They have dull appearance. However iodine and graphite show some lustr.

5. Hardness :

• Metals are generally hard for example iron metal is very hard and strong.
• Non metals are not hard or strong. They easily break when a large weight is put on them only diamond (a form of carbon) is the highest naturally occurring substance.

6. Tensile Strength :

• Metals usually have high tensile strength. the property which allow the substance to bear a lot of strain without breaking is called tensile strength.
• Non-metals have low tensile strength. So, they break easily. However, carbon fibre has high tensile strength.

8. Ductily :

• Metals have high densities but sodium and potassium have low densities.
• Non-metals have low densities and are very soft but diamond has high density.

Extra information :

Generally all metals show similar chemical properties but their reactivities depend upon their nature and reactive conditions. Metals are different from non metal depending upon their chemical reactivity.